Chapter 3. ESP32-S2 Hardware Reference
Table 1 – continued from previous page
Feature ESP32 Series ESP32-S2 Series ESP32-C3 Series
DAC Two 8-bit channels Two 8-bit channels ✖
Timers Four 64-bit general-purpose
timers, and three watchdog
timers
Four 64-bit general-purpose
timers, and three watchdog
timers
Two 54-bit general-purpose
timers, and three watchdog
timers
Temperature
sensor
✖ 1 1
Touch sensor 10 14 ✖
Hall sensor 1 ✖ ✖
GPIO 34 43 22
SPI 4 4 with more modes, compared
with ESP32
3
LCD inter-
face
1 1 ✖
UART 3 2
1
2
1
I2C 2 2 1
I2S 2, can be configured to op-
erate with 8/16/32/40/48-bit
resolution as an input or out-
put channel.
1, can be configured to oper-
ate with 8/16/24/32/48/64-bit
resolution as an input or out-
put channel.
1, can be configured to oper-
ate with 8/16/24/32-bit reso-
lution as an input or output
channel.
Camera
interface
1 1 ✖
DMA Dedicated DMA to UART,
SPI, I2S, SDIO slave,
SD/MMC host, EMAC, BT,
and Wi-Fi
Dedicated DMA to UART,
SPI, AES, SHA, I2S, and
ADC Controller
General-purpose, 3 TX chan-
nels, 3 RX channels
RMT 8 channels 4 channels
1
, can be config-
ured to TX/RX channels
4 channels
2
, 2 TX channels, 2
RX channels
Pulse
counter
8 channels 4 channels
1
✖
LED PWM 16 channels 8 channels
1
6 channels
2
MCPWM 2, six PWM outputs ✖ ✖
USB OTG ✖ 1 ✖
TWAI®
controller
(compatible
with ISO
11898-1)
1 1 1
SD/SDIO/MMC
host con-
troller
1 ✖ ✖
SDIO slave
controller
1 ✖ ✖
Ethernet
MAC
1 ✖ ✖
ULP ULP FSM PicoRV32 core with 8 KB
SRAM, ULP FSM with more
instructions
✖
Debug Assist ✖ ✖ 1
Security
Secure boot ✓
✓
✓ ✓
✓
✓ Faster and safer, compared
with ESP32
✓
✓
✓ Faster and safer, compared
with ESP32
Flash en-
cryption
✓
✓
✓ ✓
✓
✓ Support for PSRAM en-
cryption. Safer, compared
with ESP32
✓
✓
✓ Safer, compared with
ESP32
Continued on next page
Espressif Systems 1250
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